Reciprocating heat sealing means
CA 1295539 C · Owner: Plate, Gary · Inventors: Van Hattem, Nicolaas; Plate, Gary
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for thermally welding two layers together including; a first and second bar, wherein one of the bars presents a larger welding surface than the other bar; structure for reciprocally moving at least one of the bars relative to the other bar, in a first direction between an open position wherein the bars are disposed in spaced apart relationship so as to permit the insertion and withdrawal of said layers between the bars and a closed, position wherein at least one of said bars is adapted to apply heat and pressure to said layers for welding said layers together; and structure which reciprocally moves at least one of said bars relative the other bar in a second direction between two …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.